そら豆

1. Origins, structure, and basic meaning

• Structure: そら豆(そらまめ) means a broad bean, also called a fava bean.
• Basic usage: It is used for beans prepared as food or harvested from a field.

2. Common pitfalls and similar expressions

• Bean and pod
  • In そら豆のさや, さや is the pod surrounding the beans.
• A different bean
  • 枝豆(えだまめ) is immature soybean harvested in the pod, and is different from そら豆.